A thin film 10B sample for measuring the atom number

NUCLEAR, HEAVY ION AND ATOMIC PHYSICS

A thin film ¹⁰B sample for measuring the atom number

ZHANG Jiaguo，

WU Hao，

ZHANG Guohui

Nuclear Science and Techniques

Vol.21, No.2

pp.114-117

Published in print 20 Apr 2010

DOI：10.13538/j.1001-8042/nst.21.114-118

42200

In order to measure differential cross sections of the ¹⁰B(n,α)⁷Li reaction induced by MeV neutrons using the forward-backward coincidence method, a thin film ¹⁰B sample was designed and the ¹⁰B atom number was determined with a reference ¹⁰B film sample. Alpha counts of the ¹⁰B(n_th,α)⁷Li reaction from the ¹⁰B thin film and the reference sample were measured using a gridded ionization chamber and thermal neutrons, which were moderated and thermalized by paraffin from fast neutrons produced in D(d,n)³He reaction on a 4.5 MV Van de Graaff. The neutron flux was normalized by measuring the fission yield of a small ²³⁸U fission chamber.

10B thin film sampleReference 10B sample10B atom numberGridded ionization chamber

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